Malicious PDF — malware analysis report

Static analysis result for SHA-256 c54bb2ccedd2074c…

MALICIOUS

PDF

79.1 KB Created: 2021-10-02 21:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a2fc5fe7131f223ba66c797bd0d61146 SHA-1: 04907180a0970b1e4d0bfe3b5b0a69c5dfb36af4 SHA-256: c54bb2ccedd2074c378b77cf03879c72af9fdb8f5c72faa90724184cfda77997
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to domains that appear to be part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/63252396373.pdf In PDF document text
    • http://chi-kara.net/Upload/files/72110070638.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/kipikilener.pdfIn PDF document text
    • https://derechosenred.org/aym_image/files/76009353476.pdfIn PDF document text
    • https://maurinet.com/userfiles/file/lukivakeleresegi.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/4738821222.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/wakuwexivefos.pdfIn PDF document text
    • https://www.poeles-granules-vasconha.fr/ckfinder/userfiles/files/towujowunejapodadiw.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/kupafubowadotukub.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/nekebupajakefogojew.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210912212607.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/fesilesoxazawopewakolu.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/balowuzokitevo.pdfIn PDF document text
    • http://asid.rw/userfiles/file/girisawiliwaroma.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/62357763805.pdfIn PDF document text
    • http://turatabor.hu/media/jodosaloviwemazi.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/kapumutolabazali.pdfIn PDF document text
    • http://rld-carbon.com/file/35575209877.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/292d581cd4c7aca0561b79204abb55b7/lolajobepebaremigalik.pdfIn PDF document text
    • https://tybistanbul.org/resimler/files/91520471738.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b97ba40d948b60dff71fec60b64abab2/dapure.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/75187915696.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/moxovijux.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/57206687749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=my+hero+academia+one%27s+justice+2+english+dubPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 20764 bytes
SHA-256: 4646c085e753b15b7df63278a67e559476565256273f0bfba12341f80efdfb1a
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 11448 bytes
SHA-256: c3026d117446b15b50f6a18ed38d0270b9cf6fc553c8452a26f113f5cf81db25

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